Obsidian's "Outliner" plugin is really pretty good. Esp. assuming "Editing view" and "Live Preview" editing mode, (which combine for WYSIWYG).
I appreciate the standard, intuitive keyboard shortcuts for creating/removing bullets, indenting/outdenting, moving lines up or down, etc.
Also, you can use the built-in syntax for block references to kinda-sorta recreate the Roam block-based setup.